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4-Stroke Exhaust4-Stroke Exhaust

4-Stroke Dirt Bike Exhaust

It’s no secret that a properly selected aftermarket exhaust system can do wonders for your dirt bike. There isn’t an easier or faster way to add horsepower throughout your bike’s RPM range. When you want a new dirt bike exhaust system, Rocky Mountain ATV/MC is the best source around. We carry an extensive selection of dirt bike exhausts. Do you love FMF exhausts? So do we. Are you looking for a Yosh exhaust system? We’ve got several. How about a ProCircuit T-4 silencer? We carry it. Do you want a Moto Works exhaust? You’re in the right place. Interested in a Lexx MXe slip-on? Get it here at Rocky Mountain ATV/MC. If you own a 4-stroke dirt bike, a new exhaust system is a must have.

Whether you need a new exhaust system to boost your motocross racing performance or just a good silencer with a USFS-approved spark arrestor for enduro use, Rocky Mountain ATV/MC is the best place to find dirt bike exhaust pipes. We carry all of the leading brands: FMF, Yoshimura, Lexx, Pro Circuit, Motoworks and more. Exhausts are available in a variety of materials as well: titanium, stainless steel, aluminum and even carbon fiber. When you need a 4-stroke exhaust for your motorcycle, you can’t go wrong with these excellent exhaust systems. Whether you’re into motocross or just love a good trail, your dirt bike will really rip with these exhaust systems!

Latest Dirt Bike 4-Stroke Exhaust Reviews – You could win up to $500 for reviewing products!

  • FMF Power Core IV S/A Silencer

    FMF Power Core IV S/A Silencer

    Brian in OR

    Power core slip on.

    Great sound from this slip on. The instructions don't include any pics. I'm a picture kinda guy, might of helped to put this on. But, it wasn't to difficult at all.

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  • Pro Circuit T-6 Dual Exhaust System

    Pro Circuit T-6 Dual Exhaust System

    tyler in VA

    Perfect fit!! Perfect sound!d

    I was a little worried about spending over $700 on an exhaust, but now that it's on is would do it again.. Matched with the power commander5 twin air intake professionally tuned my 2016 raptor 700r se is on point! The sound is great not loud at idle or real loud through mid range.. Gets louder at WOT. But nothing like a big gun. This is the perfect in the middle sound pipe... Plus the duals make my machine the envy of the crowd. Rocky mountain didn't have them in stock when I wanted to buy them but still ordered them through here anyways. Rocky mountain has always taken great care of all my orders in the past, and they even got to my house a day earlier than planned. Two thumbs up... I would recommend these pipes the quality is far superior compared to others for a reasonable price. Don't hesitate! Im glad I didn't. Snappy throttle can really feel bottom end tourqe but more in the top of the gear where it's hard to get performance out of, dyno proven I watched the difference with my eyes.. Thank you Rocky mountain, and pro circuit.

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  • Lexx MXe Slip-On Silencer With Mid-Pipe

    Lexx MXe Slip-On Silencer With Mid-Pipe

    Tim in UT

    LEXX KICKS BUTT

    For the price comparison, you can't beat a Lexx. This Pipe and slip on is AWESOME! Looks GREAT, very easy to install and sounds even better! I took my old FMF Q4 off of my bike to replace it with this, couldn't even tell a difference.

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  • FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap

    FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap

    Ryne in IN

    Complete FMF Stainless 4.1 system

    I installed the FMF Stainless Steel Megabomb Header Pipe and FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap on my 2016 KTM 350 SX-F. On this model bike the shock must be removed in order to get the stock header off. The shock is not hard to remove and FMF even put a video on YouTube to help you. Once you install the FMF header you will not longer have to remove the shock to remove the head because the FMF header is a 2-piece header. The complete FMF system made the bike feel a little more responsive. The complete system also has a great sound. The header and silencer look great on the bike. My only complaint is that on this model is that the exhaust system is melting the number plate along the edge where the header and silencer meet.

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  • FMF Stainless Steel Megabomb Header Pipe

    FMF Stainless Steel Megabomb Header Pipe

    Ryne in IN

    Complete FMF Stainless 4.1 system

    I installed the FMF Stainless Steel Megabomb Header Pipe and FMF Factory-4.1 RCT Aluminum Silencer with Carbon End Cap on my 2016 KTM 350 SX-F. On this model bike the shock must be removed in order to get the stock header off. The shock is not hard to remove and FMF even put a video on YouTube to help you. Once you install the FMF header you will not longer have to remove the shock to remove the head because the FMF header is a 2-piece header. The complete FMF system made the bike feel a little more responsive. The complete system also has a great sound. The header and silencer look great on the bike. My only complaint is that on this model is that the exhaust system is melting the number plate along the edge where the header and silencer meet.

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  • FMF Mini Power Core IV System

    FMF Mini Power Core IV System

    brad in NC

    Great pipe!

    Gave my bike a lot more bottom end power and was easy to install.

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